diff --git a/requirements.txt b/requirements.txt
index 6088433..500a0f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ pyparsing==2.2.0
 python-dateutil==2.6.1
 pytz==2017.3
 pywin32-ctypes==0.1.2
-PyYAML==3.12
+PyYAML==5.1
 requests==2.18.4
 scikit-learn==0.19.1
 scipy==1.0.0